.chess_board {
	position: absolute;
	background-image: url('../images/chessboard(20x20).png');
	background-size: 738px 738px;
	width: 738px;
	height: 738px;
	left: 300px;
	top: 200px;
}

.user_one {
	background-image: url('../images/users/皮卡丘.png');
	left: 90px;
	width: 180px;
	height: 240px;
	top: 390px;
	position: absolute;
	background-size: 180px 240px;
}

.user_two {
	background-image: url('../images/users/大白.png');
	left: 1080px;
	width: 180px;
	height: 240px;
	top: 390px;
	position: absolute;
	background-size: 180px 240px;
}

.user_three {
	background-image: url('../images/users/无牙.png');
	left: 530px;
	width: 300px;
	height: 200px;
	top: 0px;
	position: absolute;
	background-size: 300px 200px;
}

.chess_show {
	width: 160px;
	height: 148px;
}

.choose_chess_box {
	position: absolute;
	display: flex;
	flex-wrap: wrap;
	flex-direction: row;
	width: 648px;
	height: 900px;
	left: 1260px;
	top: 50px;
}

.choose_chess_board {
	position: absolute;
	background-color: black;
	width: 100%;
	height: 100%;
	left: 0px;
	top: 0px;
	z-index: 2;
	opacity: 0.7;
	display: none;
}

.chess_down {
	position: absolute;
	width: 50px;
	height: 50px;
	top: -100px;
	left: 800px;
}

.confirm_btn {
	position: absolute;
	background-image: url('../images/confirm_btn.png');
	background-size: 150px 70px;
	height: 50px;
	width: 150px;
	left: 300px;
	top: 100px;
	font-weight: 800;
	color: white;
	font-size: 150%;
	text-align: center;
	padding-top: 20px;
	cursor: pointer;
}

.pass_btn {
	position: absolute;
	background-image: url('../images/confirm_btn.png');
	background-size: 150px 70px;
	height: 50px;
	width: 150px;
	left: 900px;
	top: 100px;
	font-weight: 800;
	color: white;
	font-size: 150%;
	text-align: center;
	padding-top: 20px;
	cursor: pointer;
}

.time_count {
	position: absolute;
	font-weight: 700;
	font-size: 200%;
	color: firebrick;
	left: 130px;
	top: 110px;
}

.alert-box {
	position: absolute;
	display: flex;
	justify-content: center;
	width: 100%;
	height: 50px;
	z-index: 20;
}

.alert-title {
	text-align: center;
	padding-top: 3px;
	height: 30px;
	width: 20%;
	border-radius: 3px;
	border: 2px solid #4CAE4C;
	background-color: #5CB85C;
	color: white;
	z-index: 20;
}

.gameOver-box {
	position: absolute;
	display: none;
	justify-content: center;
	width: 100%;
	height: 100%;
	top: 0px;
	left: 0px;
	background-image: url('../images/gameOver.jpg');
	background-size: 100% 100%;
	z-index: 1000;
}

.gameResult-box {
	position: absolute;
	top: 570px;
	width: 600px;
}

.gameResult-title {
	margin-top: 10px;
	text-align: center;
	font-size: 200%;
	font-weight: 700;
	width: 100%;
	color: #F57C3C;
}

.error_support {
	position: absolute;
	width: 50px;
	height: 50px;
	background-image: url('../images/error.png');
	background-size: 50px 50px;
	top: 20px;
	left: 140px;
	cursor: pointer;
	z-index: 100;
}